Abstract:
An image reading apparatus includes an apparatus body; a transport device that is openable and closable; an image reading unit disposed in one of the apparatus body and the transport device and reading an image of the document transported by the transport device; a member to be read that is disposed in the other of the apparatus body and the transport device at a position opposite the image reading unit when the transport device is closed, the member to be read being read by the image reading unit; and a control unit that causes the image reading unit to read the member to be read at a predetermined time, and if the transport device is open at the predetermined time, causes the image reading unit to read the member to be read when the document is transported by the transport device.
Abstract:
A carriage motor which is a heat generating device is arranged next to a CIS in a scanner unit. The carriage motor drives respective transport rollers of an ADF unit via a gear system as well. The scanner unit makes a white reference board be read so as to obtain white reference data, and obtains black reference data more frequently than the white reference data, e.g., in a continuous process for reading a document. As a CIS module continues a reading process, the black reference data changes as being affected by a change in temperature in the CIS module, etc. The scanner unit deals with such a change in the black reference data by obtaining the black reference data more frequently.
Abstract:
An image processing apparatus includes an acquisition unit configured to acquire luminance information of a white reference member by reading the white reference member with an image reading unit including a sensor while rotating the image reading unit in units of a predetermined angle, and a correction unit configured to correct the luminance information acquired by the acquisition unit using a correction coefficient predetermined for each rotation angle of the image reading unit.
Abstract:
An image reading apparatus corrects a deviation of a reading position of a document to accurately correct a luminance intensity distribution variation. Light is radiated to a shading plate (102) provided at a portion different from a reading position (luminance-intensity-distribution-variation correction reading line 103b) for a document (P) while displacing an illumination unit (101), and shading correction is carried out based on a luminance value of reflection of the light. Light is radiated to the reading position before the document (P) is transported thereto while displacing the illumination unit (101) in the same direction as a displacement direction of the illumination unit (101) at a time of performing shading correction. The luminance value of the reflected light at this time is compared with the luminance value after the shading correction to generate luminance-value reference data before the reading of the document.
Abstract:
In an image reading apparatus, based on image data obtained by reading a white image, detection is performed of an abnormal pixel based on a foreign substance adhering to a reading position of an original and data indicating a position of the abnormal pixel is outputted, then image data obtained by reading an original is corrected based on that data, and detection of the abnormal pixel is carried out immediately prior to reading of a first original, and a correction process based on data indicating a position of the abnormal pixel is carried out on image data obtained by reading a second original following on from the first original.
Abstract:
An image reader includes a moving portion, a transparent plate, a reference member, and a detecting portion. The reference member that is provided in at least one of a position that is not the manuscript contact surface in the first scanning direction and a position that is further to a side in a first direction from the transparent plate than the manuscript contact surface. The detecting portion is supported by the moving portion and includes a plurality of detecting elements, in the second scanning direction, detecting reflected light of light irradiated from a light source. A height position of the detecting portion when the reference member is on the side in the first direction is further to the side in the first direction than a height position of the detecting portion when the manuscript contact surface is on the side in the first direction.
Abstract:
There is provided an image forming apparatus including a print head adapted to form an image on a recording medium, a transport path for the recording medium, the transport path being provided on at least one of a feed side and a discharge side of the recording medium with respect to the print head, an image reading device provided on the transport path, the image reading device being adapted to read an image formed by the print head, a correction chart provided opposite the image reading device with the transport path interposed in between, the correction chart being read by the image reading device in order to correct a reading result of the image reading device, based on information obtained from reading the correction chart, and a distance adjustment device adapted to increase or decrease the distance between the correction chart and the image reading device.
Abstract:
An image processing apparatus includes a scanning unit, a gloss detecting unit, and a glossy information processing unit. The scanning unit includes a light source and is configured to scan a document to be scanned at a first illumination position not resulting in halation caused by light of the light source output to the document, and scan the document at a second illumination position resulting in halation caused by the light output to the document. The gloss detecting unit is configured to detect a glossy portion of the document based on images scanned at the first illumination position and the second illumination position. The glossy information processing unit is configured to perform a predetermined process by using information represented by the detected glossy portion.
Abstract:
An image reading apparatus includes a document cover, a cover state detector that detects whether the document cover is open or closed, an image reading unit that reads an image by conducting an optical scan that moves a scanning body with a mounted light source, detecting reflected light from the target object with a photoelectric transducer, and outputting a signal expressing the detected pixel densities, a white reference plate used as a reference for correcting an image, a power manager that switches between a power-saving state and a standby state, and a controller that controls the respective units such that in the case of restoring the standby state due to detecting the opening or closing of the document cover, an image of a document is read to detect the document size, and an image of the white reference plate is read after the detection to acquire correction values.
Abstract:
This invention provides a technique of preventing a collision between an original document and a printing material on a conveyance path when an image forming apparatus executes both additional printing on the original document and printing on the printing material. In a case where both additional printing on an original document and printing on a printing material are executed, the image forming apparatus according to one aspect of the invention conveys a read original document to a transfer unit through a conveyance path commonly used for an original document and sheet, and prints an image to be added on the original document. After the original document is conveyed to the transfer unit through the conveyance path, the image forming apparatus feeds a sheet from a sheet feeding unit to the conveyance path, and performs copying on the sheet in the transfer unit.